1.

Black eesidue having a high carbon content released by power plants.​

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Answer:

CHEMICALLY, black carbon (BC) is a component of fine particulate matter (PM ≤ 2.5 µm in aerodynamic diameter). Black carbon consists of pure carbon in several linked forms. It is formed through the incomplete COMBUSTION of fossil fuels, BIOFUEL, and biomass, and is one of the main types of particle[1] in both anthropogenic and naturally occurring soot.[2] Black carbon causes human MORBIDITY and premature mortality.[2] Because of these human health impacts, many countries have worked to reduce their emissions, making it an easy pollutant to abate in anthropogenic sources.[



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